21122002020120 has 64 divisors (see below), whose sum is σ = 63463044589920. Its totient is φ = 5623908225024.

The previous prime is 21122002020109. The next prime is 21122002020191. The reversal of 21122002020120 is 2102020022112.

It is a super-2 number, since 2×21122002020120² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21122002020120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134697049 + ... + 134853768.

Almost surely, 2^{21122002020120} is an apocalyptic number.

21122002020120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21122002020120 is an abundant number, since it is smaller than the sum of its proper divisors (42341042569800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21122002020120 is a wasteful number, since it uses less digits than its factorization.

21122002020120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269551484 (or 269551480 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21122002020120 its reverse (2102020022112), we get a palindrome (23224022042232).

The spelling of 21122002020120 in words is "twenty-one trillion, one hundred twenty-two billion, two million, twenty thousand, one hundred twenty".